drm/i915/adl_p: Disable support for 90/270 FB rotation

The latest specification removed the support for 90/270 FB rotation on
ADL_P, even though legacy Y-tiled surfaces are supported. Align the code
accordingly.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210506161930.309688-9-imre.deak@intel.com

drivers/gpu/drm/i915/display/intel_display_types.h

@@ -126,8 +126,10 @@ struct intel_framebuffer {
 
 	/* Params to remap the FB pages and program the plane registers in each view. */
 	struct intel_fb_view normal_view;
-	struct intel_fb_view rotated_view;
-	struct intel_fb_view remapped_view;
+	union {
+		struct intel_fb_view rotated_view;
+		struct intel_fb_view remapped_view;
+	};
 
 	struct i915_address_space *dpt_vm;
 };

drivers/gpu/drm/i915/display/intel_fb.c

@@ -735,6 +735,15 @@ static void intel_fb_view_init(struct intel_fb_view *view, enum i915_ggtt_view_t
 	view->gtt.type = view_type;
 }
 
+bool intel_fb_supports_90_270_rotation(const struct intel_framebuffer *fb)
+{
+	if (DISPLAY_VER(to_i915(fb->base.dev)) >= 13)
+		return false;
+
+	return fb->base.modifier == I915_FORMAT_MOD_Y_TILED ||
+	       fb->base.modifier == I915_FORMAT_MOD_Yf_TILED;
+}
+
 int intel_fill_fb_info(struct drm_i915_private *i915, struct intel_framebuffer *fb)
 {
 	struct drm_i915_gem_object *obj = intel_fb_obj(&fb->base);
@@ -745,8 +754,15 @@ int intel_fill_fb_info(struct drm_i915_private *i915, struct intel_framebuffer *
 	unsigned int tile_size = intel_tile_size(i915);
 
 	intel_fb_view_init(&fb->normal_view, I915_GGTT_VIEW_NORMAL);
-	intel_fb_view_init(&fb->rotated_view, I915_GGTT_VIEW_ROTATED);
-	intel_fb_view_init(&fb->remapped_view, I915_GGTT_VIEW_REMAPPED);
+
+	drm_WARN_ON(&i915->drm,
+		    intel_fb_supports_90_270_rotation(fb) &&
+		    intel_fb_needs_pot_stride_remap(fb));
+
+	if (intel_fb_supports_90_270_rotation(fb))
+		intel_fb_view_init(&fb->rotated_view, I915_GGTT_VIEW_ROTATED);
+	if (intel_fb_needs_pot_stride_remap(fb))
+		intel_fb_view_init(&fb->remapped_view, I915_GGTT_VIEW_REMAPPED);
 
 	for (i = 0; i < num_planes; i++) {
 		struct fb_plane_view_dims view_dims;
@@ -787,9 +803,7 @@ int intel_fill_fb_info(struct drm_i915_private *i915, struct intel_framebuffer *
 
 		offset = calc_plane_aligned_offset(fb, i, &x, &y);
 
-		/* Y or Yf modifiers required for 90/270 rotation */
-		if (fb->base.modifier == I915_FORMAT_MOD_Y_TILED ||
-		    fb->base.modifier == I915_FORMAT_MOD_Yf_TILED)
+		if (intel_fb_supports_90_270_rotation(fb))
 			gtt_offset_rotated += calc_plane_remap_info(fb, i, &view_dims,
 								    offset, gtt_offset_rotated, x, y,
 								    &fb->rotated_view);

drivers/gpu/drm/i915/display/intel_fb.h

@@ -45,6 +45,8 @@ u32 intel_plane_compute_aligned_offset(int *x, int *y,
 				       const struct intel_plane_state *state,
 				       int color_plane);
 
+bool intel_fb_supports_90_270_rotation(const struct intel_framebuffer *fb);
+
 int intel_fill_fb_info(struct drm_i915_private *i915, struct intel_framebuffer *fb);
 void intel_fb_fill_view(const struct intel_framebuffer *fb, unsigned int rotation,
 			struct intel_fb_view *view);

drivers/gpu/drm/i915/display/skl_universal_plane.c

@@ -1166,8 +1166,7 @@ static int skl_plane_check_fb(const struct intel_crtc_state *crtc_state,
 	}
 
 	if (drm_rotation_90_or_270(rotation)) {
-		if (fb->modifier != I915_FORMAT_MOD_Y_TILED &&
-		    fb->modifier != I915_FORMAT_MOD_Yf_TILED) {
+		if (!intel_fb_supports_90_270_rotation(to_intel_framebuffer(fb))) {
 			drm_dbg_kms(&dev_priv->drm,
 				    "Y/Yf tiling required for 90/270!\n");
 			return -EINVAL;